Sorption behavior of selenium and antimony in soils as a function of phosphate ion concentration

Autor: Yasuo Nakamaru, Kenji Sekine
Rok vydání: 2008
Předmět:
Zdroj: Soil Science and Plant Nutrition. 54:332-341
ISSN: 1747-0765
0038-0768
DOI: 10.1111/j.1747-0765.2008.00247.x
Popis: Both selenium (Se) and antimony (Sb) are major soil and water pollutants. Their sorption behavior in a soil–plant system was studied. Soil–soil solution distribution coefficients (K ds) for Se and Sb were measured, using a radiotracer, as an indicator of their sorption levels. Both Se and Sb behave as oxoanions (SeO2− 4, H2PO− 4 and SO2− 4) in soil; thus, the effects of concentrations of two major oxoanions (SeO2− 4 and SeO2− 3) on Se and Sb sorption were also examined. The K d values for Se for Japanese soils significantly correlated with the K d values for Sb (n = 141). The K ds of both Se and Sb similarly decreased with increasing SbO− 3 concentration. These results indicated that the sorption of Se and Sb was similarly controlled by a ligand-exchange mechanism such as phosphate sorption in soil. However, an increase in the concentration of SeO2− 3 did not decrease the K ds of Se and Sb. Furthermore, the ligand-exchangeable fractions of stable Se and Sb in major Japanese soils were determined ...
Databáze: OpenAIRE
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